Designed exclusively for the Aimpoint Comp. A.R.M.S. unique ring saddle allows for optimum surface purchasing for the most secure fit. Ultra rugged and low mounting that can also be modularly raised via optional spacer platform at a modest cost. Secured to an A.R.M.S. #17 Platform with the A.R.M.S. patented Throw Lever system guarantees easy on and off repeat zero. Built in no mar patented buffer pad. It now fits both the M1 and M2 model variations of the Aimpoint Comp. Sight.